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    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>hr标签</title>
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<body>
    <hr color="green">ALT+SHIFT+箭头（快速复制）
    <hr color="yellow">
    <hr color="red">
    
    
    <hr color="green" width="300px">
    <hr color="green" width="600px">
    <hr color="red" width="600px" align="left">align对齐
    <hr color="red" width="600px" align="right">

    <hr>默认有阴影显示
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